131343161 has 2 divisors, whose sum is σ = 131343162. Its totient is φ = 131343160.

The previous prime is 131343137. The next prime is 131343211. The reversal of 131343161 is 161343131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98624761 + 32718400 = 9931^2 + 5720^2 .

It is a cyclic number.

It is not a de Polignac number, because 131343161 - 2⁶ = 131343097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131343361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65671580 + 65671581.

It is an arithmetic number, because the mean of its divisors is an integer number (65671581).

Almost surely, 2^131343161 is an apocalyptic number.

It is an amenable number.

131343161 is a deficient number, since it is larger than the sum of its proper divisors (1).

131343161 is an equidigital number, since it uses as much as digits as its factorization.

131343161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 131343161 is about 11460.5043955316. The cubic root of 131343161 is about 508.3183893364.

Adding to 131343161 its reverse (161343131), we get a palindrome (292686292).

The spelling of 131343161 in words is "one hundred thirty-one million, three hundred forty-three thousand, one hundred sixty-one".